I have a game with tiles. Each tile is a number, and each number is one of six colors. The color is important to the game play, and I want to make the game available to those who are color blind. ...
Globally the number of people of all ages visually impaired is estimated to be 285 million, of whom 39 million are blind. — World Health Organisation, 2010. (That's 4.2% and 0.6% of the ...